On a regression model predicting the incidence rate of the disease "ulcerative colitis" from the level of development of a country
Part of : Αρχείον οικονομικής ιστορίας ; Vol.XXI, No.2, 2009, pages 35-44
Issue:
Pages:
35-44
Abstract:
Our aim is to examine whether there is a connection between a country’s level of development and the incidence rate of ulcerative colitis (UC) observed in it. We gathered as many articles as possible mentioning the incidence rates of ulcerative colitis in different countries around the world. Additionally, we found data on the Gross National Product (GNP) of the countries of whom we had found the incidence rate of UC. Thus, we formed a list of countries for which we had the GNP of it and the incidence rate of UC. GNP was gathered because we considered it to be a measure of a country’s development. Data were gathered for 35 countries. The Sample Correlation Coefficient of UC Incidence Rate and GNP is 0,731 and it is statistically significant at the 0,05 level of significance, because p=0,000001. In this paper we propose a linear regression model between the two variables and by the Least Squares Method we obtained R = 0,731 , F = 18,341 , and Significance of F at 5% = 0,0001. Our results show that there is a positive correlation between the incidence rate of UC and the GNP of a country. Therefore, a new concept is being introduced: IncidenceDeveloped Countries > IncidenceDeveloping Countries. This view is more general, because it explains the previous concept and its exceptions, given that Northern Countries, generally, tend to be developed and not developing.
Subject:
Subject (LC):
Keywords:
Ulcerative Colitis, Incidence Rate, Gross National Product, Sample Correlation Coefficient, Least Squares Method
Notes:
JEL classification: G23, L89
